Sweetwater Regional Park Weather Forecast

    • 66
    • 75

    Increasing Clouds

    • 64
    • 73

    Partly Sunny

    • 65
    • 75

    Mostly Sunny

    • 66
    • 79

    Mostly Sunny

    • 68
    • 81

    Mostly Sunny

    • 68
    • 84

    Mostly Sunny

Today 20 Sep San Diego County Coastal Areas

Mostly cloudy in the morning. Becoming partly cloudy. Highs 73 to 77. Light Winds becoming southwest 10 Mph in the afternoon.

Tonight 20 Sep San Diego County Coastal Areas

Mostly cloudy. Lows 62 to 66. Light Winds.

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Sweetwater Regional Park Temperature Statistics

September Temperature

San Diego, Brown Field Municipal Airport (6.8 miles)

  • Lowest 3 September, 2026

    56.6 °F

  • Average September

    76.8 °F

  • Highest 9 September, 2026

    100.7 °F

Climate (2021–2026)

San Diego, Brown Field Municipal Airport (6.8 miles)

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  • Average Low 2021–2026

    54.3 °F

  • Average 2021–2026

    64 °F

  • Average High 2021–2026

    74.4 °F
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